<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>demo</title>
    <script type="text/javascript" src="../vue.js"></script>
</head>

<body>
    <div id="app">

        <input type="text" v-model.number.lazy="score">
        <!-- 多个文件一起渲染 -->
        <p v-if="score > 90">成绩是A</p>
        <p v-else-if="score > 70">成绩是B</p>
        <p v-else-if="score > 50">成绩是C</p>
        <p v-else>成绩是D</p>
    </div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false
    const vm = new Vue({
        el: "#app",
        data() {
            return {
          score: null
        }
        }
    })
</script>

</html>